Screamer 1

Cheat codes: Type them in at any menu.
VTELO : All normal tracks available
INVER : All normal plus inverted tracks
MONTY : New obstacles Set 1
JOINT : New obstacles Set 2
CLOCK : Stop clock
TAZOR : Bullet car available
ABURN : Race against other bullet cars
UPDOW : Turns graphics upside down
MIRRO : Mirror mode

by (c)(R)TM (Information from Cheat Machine)